Paper-cutting and delivery mechanism for web cylinder lithographing or printing presses



May 23, 1950 Q L; M. 'STEMP-EL 2,509,047 PAPER CUTTING AND DELIVERY MECHANISM FOR WEB.

CYLINDER LITHOGRAPHING 0R PRINTING PRESSES Filed July 1, 1946 Laszju M Stempa] I I INVENTOR ATT6 NEY5 Fatentecl May 23, 1950 PAPER-CUTTING AND DELIVERY MECHA- NISM FOR WEB CYLINDER LITHOGRAPH- ING OR PRINTING PRESSES Laszlo M. Stempel, New York, N. Y., assignor, by mesne assignments, to R. Hoe & 00., Inc., New York, N. Y., a corporation of New York Application July 1, 1946, Serial No. 680,719

Claims. (01. 164 67) This invention relates to improvements in cutting and delivery mechanism for web cylinder lithographic or printing presses.

An object of the invention is to provide improved means for throwing out or rejecting sheets.

A further object of the invention is to provide means for cutting off and delivering different sizes of sheets.

With these and still other objects which will appear in the following full description in mind, the invention consists in the combinations and arrangements of parts which will now first be fully described in connection with the accompanying drawing and then be more particularly pointed out in the appended claims.

In the drawing:

Figure 1 is a longitudinalsectional view of cutoff and delivery mechanism embodying the invention in a preferred form of embodiment; and

Figure 2 is a plan view showing the gearing of the device of Figure 1.

The present invention is an improvement upon the machine disclosed in Smith Patent No. 2,011,505, granted August 13, 1935, for Paper cutting and delivery mechanism for web cylinder lithographic or printing presses. Inasmuch as such mechanism is, in general, now Well-known, only the elements necessary for a full understanding of the present invention are described herein.

Referring to Figure l, a web I which has previously been printed by the printing cylinders, not shown, is shown as passing between th conveyor or feed roller 2 and conveyor wheels 3 which are carried on shaft 4. The web continues under a sand or emery roller 5 and along guide plate 6 to the cutting off mechanism, comprising stationary ledger blade I and rotary cutter blade 8, being cut into sheets thereby. The rotary cutter blade is carried on a hollow member ID, through the center of which air is supplied for a purpose later described to a slot l l The mechanism is driven by gear l2 off the press drive. The entire mechanism may be advanced or retarded for register with the printing units, where desired, by utilizing any of the usual mechanisms for so adjusting the gear I2. Gear 12 meshes with a gear l3 fixed on the shaft 2' of roller 2 for driving the same. Gear I3, in

turn, drives the intermediate gear 14 and this gear drives the rotary cutter either through gears l5 and It or through gears I! and IS. The gears l5 and El are constantly in mesh with gears i6 and i8, and are carried by a swinging plate 20 which is pivoted around the shaft 9 which carries hollow member I!) for swinging concentrically about the common axis of gears I6 and I8. With this plate in the position of Figure 1, the drive is from gear M through gears l5 and [6, this drive corresponding to the cutter speed for producing a sheet of longer length, as, for example, seventeen inches. Swinging the plate 20 clockwise in the figure will move the gear I 5 out of mesh with the intermediate gear [4 and will bring gear ll into mesh therewith. The gear ratios are selected so that when the gears are shifted to this alternative position, the cutter will be rotated at twice the speed so as to cut off sheets of half the length, as, for example, eight and onehalf inches. The plate 20 may be fixed in either position of adjustment by pin 20' cooperating with holes 2! in the frame 22. Utilizin a pile delivery of usual type, driven by a cam arrangement from the cutter, as shown in the Smith patent, or otherwise, moveable elements of the delivery will automatically run at the appropriate speed with relation to the cutter in either position of the gearing. The sheets having been cut off are received on a guide plate 3i and directed to delivery tapes 3 i The guide plate 3| is pivotally mounted on shaft 32 and may be dropped into the position shown in dotted lines by moving the shaft 33, which is connected to the guide plate through arms 34 and 35 and a link 36. The shaft 33 may be oscillated either manually or automatically as desired either from a position adjacent thereto or remote therefrom. When the shaft 33 is moved to the left to bring the guide plate in the dotted line position, the sheets will no longer be guided to the delivery belts 3|, but will be deflected downward into a suitable receptacle within the frame. The hollow member [0 carrying the cutter is connected to a rotary air valve 39 which automatically opens and closes in proper timed relation to direct a blast of air against the sheet as it passes the blade 1, and air pressure is supplied to the valve 30 by a line not shown which is provided with a cut-off valve that is opened only when the shaft 33 is turned to move the guide plate 3! to the dotted position. Thus when the shaft 33 is turned to deflect an unwanted sheet, air is simultaneously directed through the slot H against the sheet and prevents it from reaching the delivery belts 3 I. The air valve 30 may be of the type shown in the Smith patent, above mentioned, or of any other suitable form.

What is claimed is:

1. In a cutting and delivery mechanism for cylinder presses, the combination with the rota ry cutter and the feed roller, of a g'ear in driving connection with the feed roller, an idle gear and a gear fixed to the cutter for driving the same from the first said gear, a. second idle gear and a second gear fixed to the cutter for driving the same from the first said gear at a different ratio, a frame for holding the said idle gears in mesh with the respective gears fiii'ed to the cutter shaft, and means supporting the said frame for pivoting about the cutter axis to engage the said idle gears alternatively with the first said gear for changing the length of sheet cut off by the cutter.

2. In a cutting and delivery mechanism for cylinder presses, the combination with web feed and a rotary cutter coasting therewith to cut sheets, fdf guide means for receiving sheets from the cutter and directing them to a delivery station, air blast means operable to defleet the "sheets downwardly on to the said guide means, and means for moving the said guide means to guide sheets under the action of said blast downwardly to a reject station. v

3. m a cutting and delivery mechanism for cylinder presses, the combination with web feed mechanism and rotary cutter coactin'g therewith to cut sheets, or guide means for receiving sheets mm the cutter and "directing them to a delivery station, air blast means synchronized with said butter for dei'lectin'g the sheets downwardly on to the said guide means as they emerge from the cutter, and means for moving the said guide means to guide sheets under the action of said air blast downwardly to a re} ect station.

4. In a cutting and delivery mechanism for cylinder presses, the combination with web feed mechanism and a rotary cutter coacting therewith to cut sheets, of guide means for receiving sheets from the cutter and directing them to a delivery station, air blast means embodied in the cutter and operable to deflect sheets downwardly on to the said guide means, and means for mov- 'ing the said guide means to guide sheets under the action of said air blast downwardly to a rej'ect station.

5. In a cutting and delivery mechanism for cylinder presses, the combination with web feed mechanism and a rotary cutter coacting therewith to cut sheets, of means for selectively driving the utter "at either of two predetermined speed ratios from the Web feed mechanism, guide means for receiving sheets from the cutter and directing them to a delivery station, air blast means embodied in the cutter and operable when the cutter is in a predetermined position to defleet sheets downwardly on to the said guide means as they emerge from the cutter, and means for moving the said guide means to guide sheets under the action of said air blast downwardly to a reject station.

LASZLO M. STEMP-EL.

REFERENCES CITED The following references "are of "record in the file of this patent:

UNITED STATES PATENTS Number v Name Date 1,849,501 Macrarr-en et al-. l Mar. 15, I932 -2,l{l4, 30'7 Hallden ie Jan. '17, 1939 2,190,638 Talbot -ei Feb. 3, 1 940 

